Improvement in feeding devices for middlings-purifiers



nfcnAlK. Feeding-Devices for MiddI-ings Purifiers.

No. 143,887. Patenfed'o`ct.21,1a73.

UNITED S'rrrrns` N PArnrrnQrrJ-na ROBERT CRAIK, OF MONEY GREEK,MINNESOTA.

IMPROVEMENT IN FEEDING DEVICES FOR MIDDLINGS-PURIFIERS.

Specification forming part of Letters Patent No. 143,887, dated October21, 1873; application filed March 25, 187 3.

To all whom t may concern Be it known that I, ROBERT GRAlK, of MoneyYGreek, in the county of Houston, State of Minnesota, have invented anImprovement in Middlingsseparator, of which the following is aspecification The invention relates to an improvement in conveyers formiddling-separators, and consists in providing the conveyer with aseries of secondary nights7 for the purpose hereinafter described.

The figure in the accompanying drawing illustrates a vertical section ofa middlings-puriier havingymy improved conveyer applied tothe same. v

A is the frame which carries the operating mechanism. L is the driving-pulley attached to the shaft B, and gives motionto the ma chine. A Aare vibrating frames, supported by the springs q q, to the bottom ofwhich is attached bolt-cloths.` Upon the shaft B is secured a cam,which, by its eonnection,vibrates the frames A A. H is a suction-fan,which is caused to revolve bythe pulley g being belted to the pulley fon the shaft B. This fan causes the air to pass up through the boltsfrom the openings in the adjustable divisionboards F F. M is thefeed-hopper, and r is an adjust-` able perforated slide, which isvibrated by its connection with the `bolt-frame A', and under this isthe movable bottom s, which is also perforated to correspond with theslide r, for regulating the supply of feed. The brushes C are made witha bearing at each end, and are supported in the boxes c c, which restand slide upon the horizontal bars D. These brushes are caused tohave areciprocating movement across the bottom of the bolt-cloth by the crank7c on the conveyer G, through the rock-shaft K and arms E E, as shown. Grepresents my im proved conveyer-shaft, which is provided with onethread of flights, m, and at one end there are added several flights, o,and an opening, a, made in the one already on. This will allow themiddlings to accumulate and permit each of the secondary or additionalflights 0 to take a portion and deliver it tothe pipe I), and thus feedit evenly to the millstones. The divisionboards F F are adjusted bythumb-screws c' 17, and regulate the draft of air. The tube J isarranged at the top of the separator, so as to take air from off the endof the frames A and counterbalance the draft of air inward at thatpoint, which obstructs the passage of the light bran from that end ofthe frame, and, by means of the valve'a., the light bran may be causedto pass off fast or slow, as desired.

The slide r and movable bottom s of the hopper M are operated by meansof the levert and vibrating frame A.

I have described the entire middlings-separator, but do not claim such,as my invention only consists in the peculiar manner of constructing theconveyer G.

I claim- The conveyer G, with a series of secondary nights, o o, forfeeding the middlings evenly to the pipe P, as herein described.

In testimony that I claim the foregoing I have hereunto set my hand.

ROBERT CRAIK.

Vvritnesses N. BUCK,

J AMES MoINTosH.

